I don’t know, perhaps something I don’t have set up or they’re just being nice, this is what I got;
Sticking the details into 發票查詢 - Amego 光貿電子發票加值中心 lead to being able to download a pdf of the receipt which then could be printed (2 side printing A4 only!), alternatively there was some way to connect to an App and get paid through that but I’d had enough of electronic “convenience” by then and just did the caveman print.
If you paid for a purchase by card, or if the seller issues a receipt, then you’d have one, and of course with the possibility of winning, not that I won any… chance of winning is so low.
Not all sellers will issue a receipt… the COD only ones often don’t.
Finally got to 7-11 with my carefully double sided printed paper and was rather vexed to be told I would only receive NT$498! The bastards. Even after handing over the 2NT suggested by the clerk in order to receive a disappointingly crumbled NT$500 note rather than a handfull of shrapnel my win euphoria has been severely dented. Those who giveth do indeed take away.